Improvement in injectors



4 Shets-Sheet 4. J. E. BUTT.-

Injector.

No. 209,220. PateniedOct. 22,1878.

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NJEI'ERS, FHOTO-LITHOGRAPNER. WASHINGTON. D c.

ter explained.

UNITED STATES PATENT OFFICE.

JOSEPH nBoTT, OF NOTTINGHAM, ENGLAND, ASSIGNOR TO CHARLES ODLING, orSAME PLACE.

IM PROVEMENT IN INJECTORS.

Specification forming part of Letters Patent No. 209,220, dated October22, 1878 application filed July 5, 1878.

constructed to pump or lift its supply of water; the second is aninjector that forces its 1 supply of water when on a level with or abovethe injector; and the third modification con sists of a non-regulatinginjector.

Referring to the drawings, Figure 1 isan outer view of No.1 injector;Fig. 2, a longitudinal sectional view; Fig. 3, a cross-section on theline It Rof Fig. 2. Figs. 4, 5, 6, and 7 are parts of the same, shownseparately. Fig. Sis a sectional view of a forcing-injector, and Fig. 9a sectional View of a non-regulating injector.

In cases where an injector is required to first pump or lift its supplyof water, 1 construct an injector of the following parts, (shown atFigs. 1 to 7:)

A is the body of the injector; B, a movable nozzle, through which steamis passed. This nozzle is provided on its exterior with spiral grooves,for a purpose which will be hereinaf- B, packing to make the samesteam-tight; C, an internally screw-threaded cap to raise and lower thesteam-nozzle; G, a conical seat to prevent leakage; D,. a spindlearranged centrally within the nozzle B, and having its tapering surfaceb provided with spiral grooves, terminating at its point; E, asecuring-nut; F, hand-wheel for working the regulating-cap O; G,asecuring-nut; H, glandnut; I, gland; J, a wheelfor operating thespindle D, a portion of the body of which is screw-threaded, to engagewith an internal screw-thread in the upper portion of the nozzle K, aninternally spiral-threaded nipple or injection cone, for increasing thespeed of feed; L, air-chamber and overflow for wastewater; M,suction-pipe from water-supply; N,

. steam-pipe from boiler; N, opening in the movable nozzle B to admitsteam; O, delivery of feed-water to boiler; I, solid guide working in aslot out in the movable nozzle B, (shown by dotted lines in Fig. 2;) Q,an improved is as follows: The hand-wheel F is turned until the nozzle Bis raised to its full height. During this action the spindle D isretained on its seat by being screwed into the nozzle B independent ofany other part. The nozzle B does'not revolve, but is raised and loweredby means of the rotation of the screw-cap G, and prevented from rotatingby means of a slot cut in it, which works upon a solid guide-block, 1P,cast with the body A. The raising of the spindle D above the lower edgeof the opening N admits steam into the nozzle B, the point of thespindle causing the steam to form an annular air becomes rarefied by theheat imparted to it, and gives additional impetus to the spiral jet,which is increased in pressure by means of the reduced bore of theregulated injectioncone K.

According to the high or low pressure of steam used, a correspondingquantity of uncondensed steam or surplus water. will be ejected throughthe overflow, which may be regulated by the double action of thesteamnozzle B, which either reduces the steam and increases the water,or increases the steam and reduces the water, thus effectuallypreventing the water from flooding the steam, or the steam fromoverpowering the water, as is the casein many other kinds of injectors.water, steam, and air, after having passed the injection -cone K, areforced into the boiler through a pipe connected to the injector atO, thewater entering the boiler at a temperature of from 180 to 208,Fahrenheits thermometer, according to the pressure of steam.

A second modification of an injector is.

The

shown in section at Fig. 8, for forcing the water when the supply is on.a level with or above the injector, as in case of locomotives or landand marine boilers, and consists of the following parts: A, the body ofthe injector; B, movable externally spiral-grooved nozzle, through whichsteam is passed; 0, a screwed cap to raise or lower the nozzle; 0conical seat to prevent leakage; 0 solid square for a lever to work thecap; D, packing; E, gland-nut, F, gland; Gr, screwed injectioncone,formed square at the bottomto facilitate examining and cleaning bywithdrawing the cone; H, air-chamber and overflow; I, water inlet andchamber; J, steam inlet and chamber; K, delivery to boiler; L and 1,slot and stud to give motion to the nozzle B M, straight bore ofreception-orifice. By an injector con- 7 structed as above described thequantity of water can be regulated, so as to prevent the water floodingthe steam, or the steam or'erpowering the water. When the steam-press'ure varies more than ten pounds either above or below the generalworking pressure, this injector will deliver water, into the boiler atfrom 180 to 205, Fahrenheits thermometer, according to thesteam-pressure and temperature of the supply-water.

In cases where the water-supply is on a level with or above theinjector, and the steampressure of the boiler to which it is attacheddoes not vary more than ten pounds pressure above or below the generalworking pressure, I employ a third modification of injector, which Icall a non-regulatin g injector, consisting of the following parts,(shown in section at Fig. 9 z) A, body of the injector; B, a fixedexternally spiral-threaded nozzle, through which steam is passed; 0,screwed injection-cone, formed square at the bottom; D, inlet for steamfrom the steam-pipe tolwhich it is connected; E, water inlet andchamber; F, airehamber and overflow; Gr, delivery to boiler.

The action of the above-described injector is as follows: Steam isadmitted direct to the tapered nozzle B, and upon the water beingadmitted through E, the steam' is instantly condensed, and the combinedsteam and water takes the form of a spiral jet, which gathering air fromthe air-chamber F, its power is increased, and it enters the boilerthrough the usual back-pressure valve. The nozzle B, being set at thetime of making, requires no further attention in this injector. There isonly a slight overflow for a moment, until thejet of steam is fullycombined with the water. If the water and steam cocks are connected toone lever they may be opened simultaneously, and there will not be anyoverflow.

My injector for forcing only is so constructed that the working" partscan be taken out, examined, and refixed without stopping engine, boiler,or disconnecting the injector, and will effect a saving in theconsumption of fuel by the water being injected into the boiler atnearly boiling-point.

My non-regulating injector is the simplest injector that can be made;there are not any working parts; the two fixed parts can be removed,examined, and renewed in a few minutes; its action is certain, the rightquantity of water being regulated by means of the ordinary steam-cock.

While in the foregoing specification the nozzle, spindle, and deliverynipple or cone have all three been described as spirally threaded orgrooved, either the spindle or nozzle maybe left plain, and may be usedin an injector having a delivery nipple or cone with a plain internalsurface.

hat 1 claim is 1. An injector having one or more of its interiorsurfaces adapted to guide water or steam spirally as it passes throughsaid injector, substantially as described.

2. An injector having a steam-delivery nozzle provided internally withmeans for giving a spiral direction to steam passing therethrough, andexternally with means for guiding in a spiral direction the waterflowing through the outer shell or casing of said injector,substantially as set forth.

3. The combination, with the shell or casing A, having water-inlet M andsteam-inlet N, of

the longitudinally-adjustable nozzle B, having lateral opening N, andprovided with means for preventing its rotation. and thelongitudinally-adj ustable spindle D, having an enlarged portion,serving as a plug for the lateral openin g of the nozzle,substantiallyas described.

4. In an injector, the combination of the casing A, having inwardprojection P, slotted adjustable nozzle B, screw-cap (J, and itsoperating-wheel, substantially as described, whereby the nozzle may beadjusted in either direction without altering the length of the injectorshell or casin g.

5. The combination of the injector shell or casing A, having thesteam-inlet N and a suitable water-inlet, with thelongitudinallyadjustable nozzle B, having the lateral opening N, andprovided with means to prevent its rotation, substantially as described.

6. An injector having an internally spiral threaded or grooveddelivery-nipple, K, sub stantially as described.

JOSEPH ELTON BOTT.

WVitncsses:

H. W. GOUGH, Civil Engineer. J. H. GOUG'II-

